First, mix both sugars, set aside. Whip whites on med. up to a soft peak. Add sugars one tablespoon at a time, while mixing. When all sugar is added, turn on high and whip to a stiff peak. Fold in pecans and vanilla. Drop by spoonfulls onto parchment lined cookie sheets. Smooth with the back of the spoon into rounds a half to 3/4 inches thick. Bake at 300 for 30-40 minutes or until dry and a light golden brown. Makes 24 big cookies.